1996 Audi A6 It's hard to start

Dead Battery --Replace it

when you turn the key do you hear anything from the starter?

try connecting pump direct to battery to see if pump works if it dose then a fuse or relay check all wire connections

If yours Audi A6 has a TDI engine then you must check up (and replace if necessary) each glow plug & glow plugs relay if no burned glow plugs founded.

i have a 2001 Audi A6 quattro 95,000 miles when i change gear the car seems to over rev or keep reving when i put my foot on the clutch for a split second chould you tell me why is this

either a dead battery or bad wire connections from battery to starter first check and clean battery connections if still not starting try jumping battery if it still click than you have bad connection at starter

CHECK FUSE AND RELAY FIRST IF THEY ARE GOOD.SOUND LIKE FUEL PUMP IS FAULTY.

Yes
First thing is to test the battery and this is how Turn on head lights, if dull leave on to see how long the stay on for. Next turn lights off put battery on charge for 6 hrs .Turn on lights again if still dull either battery or charger no good
If lights bright try to start and when starter trys to turn engine over the lights go dim THEN battery is no good.
Then get a jump start from another battery and put pos term on both batterys first, then earth lead(BLACK) on last then start if starts ok remove the BLACK lead and turn on head lights if goes bright ALTERNATORs ok so replace battery ....

I've had similar problem with AUDI A6. AUDI replaced phone controller, covered by 70% by manufacturer. Total cost 400 Euros, repir was done in Germany.

Known issue to occur occasionally on VW/Audi. What is occurring is that the alternator is not spinning out fast enough to start charging, so the light is on. Once you rev the engine, the alternator starts to charge and remains charging till its shut off and restarted. It can be related to too low of an idle (not adjustable, unless you have a dirty throttle plate or air leak), the alternator itself (aftermarket or a bad rebuild) or an incorrect alternator pulley installed (too large).